Interesting, I remember reading about the possibility that Abraham wasn't from Mesopotamia several years ago. Since Dr. Gee places Abraham in the 2000-1800 time period, I wonder when he dates the Exodus.Actually, I place Abraham a bit lower in time. The events in Abraham chapter 1 fit best into the reigns of Sesostris III and Amenemhet III. Conventionally that is dated about 1860-1800 BC. This means that Abraham is dated somewhere in the 1850-1750 BC range.
If we take the reference to Israel in the Merneptah stele as indicative of Israel being established in the land of Canaan, then the Exodus would fit somewhere in the middle of the reign of Ramses II (conventionally about 1280-1220 BC). There are other scenarios that can be entertained, but this is the simplest.